... output(Relay, SSR, 4-20mA ). 85 to 264Va TEH-C series intelligent PID digital controllers adopt advanced micro-process technology ... Voltage, PulsePower consumptionLess than 5 VAControl algorithms optionsP, PI, PD, PID, or on/offAlarmsUpper limit alarm, lower limit alarmWorking ... temperature0 to 50 °C (32 to 122 °F)Working humidity85% RH max, ...